Sewage Sludge Flow and Drying Characteristics in Paddle Dryers

被引:9
作者
Zhang, Houlei [1 ]
Liu, Xinzhi [1 ]
Zhu, Shuguang [1 ]
Li, Bin [1 ]
机构
[1] Nanjing Univ Sci & Technol, Sch Energy & Power Engn, Nanjing 210094, Jiangsu, Peoples R China
来源
DIFFUSION IN SOLIDS AND LIQUIDS VIII | 2013年 / 334-335卷
关键词
Sewage sludge; paddle dryer; flow; drying; additive; IDENTIFICATION; SIMULATION;
D O I
10.4028/www.scientific.net/DDF.334-335.365
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Sewage sludge from wastewater treatment is being more and more produced in many countries. For sewage sludge disposal, drying operation is usually required and greatly energy-consuming. Paddle dryers, one kind of indirect dryers, are widely used in removing moisture of sewage sludge recently, but the design, to some extent, still depends on empirical and limited data. In this paper, we presented preliminary experimental results of sewage sludge drying based on a 3 m(2) paddle dryer prototype. The effects of thermal oil inlet temperature on outlet moisture content and mass flowrate of initial sludge are recorded and analyzed. A simple monotonic relation between mass flowrate of initial sludge and thermal oil inlet temperature does not exist. Besides, we performed the drying experiment of adding low-value biomass (rice husk) into wet sewage sludge. The results show that the drying performance is improved significantly.
引用
收藏
页码:365 / 368
页数:4
相关论文
共 14 条
[1]  
[Anonymous], CHERMICAL ENG T
[2]  
[Anonymous], 2006, MODERN DRYING TECHNO
[3]   Identification of the limiting mechanism in contact drying of agitated sewage sludge [J].
Arlabosse, P. ;
Chitu, T. .
DRYING TECHNOLOGY, 2007, 25 (4-6) :557-567
[4]   Drying of municipal sewage sludge: From a laboratory scale batch indirect dryer to the paddle dryer [J].
Arlabosse, P ;
Chavez, S ;
Prevot, C .
BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING, 2005, 22 (02) :227-232
[5]   Method for thermal design of paddle dryers: Application to municipal sewage sludge [J].
Arlabosse, P ;
Chavez, S ;
Lecomte, D .
DRYING TECHNOLOGY, 2004, 22 (10) :2375-2393
[6]   Measurement and simulation of the contact drying of sewage sludge in a Nara-type paddle dryer [J].
Deng, Wen-Yi ;
Yan, Jian-Hua ;
Li, Xiao-Dong ;
Wang, Fei ;
Lu, Sheng-Yong ;
Chi, Yong ;
Cen, Ke-Fa .
CHEMICAL ENGINEERING SCIENCE, 2009, 64 (24) :5117-5124
[7]   Measurement and simulation of the vacuum contact drying of pastes in a LIST-type kneader drier [J].
Dittler, A ;
Bamberger, T ;
Gehrmann, D ;
Schlunder, EU .
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 1997, 36 (04) :301-308
[8]   Sticky region in drying - definition and identification [J].
Kudra, T .
DRYING TECHNOLOGY, 2003, 21 (08) :1457-1469
[9]  
Schlunder E.U., 1984, CHEM ENG PROCESS, V18, P93, DOI [10.1016/0255-2701(84)85012-6, DOI 10.1016/0255-2701(84)85012-6]
[10]  
Urciuolo M., 2012, EXPT THERMAL FLUID S, DOI DOI 10.1016/J.EXPTHERMF1USCI.2012.03.019